Nmap

Nmap is an incredibly useful tool, but it’s even more useful if you understand the results of an Nmap scan. After a scan is complete, Nmap will categorize each scanned port into one of six states. This tutorial describes Nmap’s possible outcomes and shows how each disposition is derived.

The fragmentation of IP frames can create a challenge for firewalls and intrusion detection systems. In this tutorial, we'll show you how Nmap can be used to test and secure your systems against fragmentation vulnerabilities.

Nmap 4.5 introduced a number of new features, and this video provides an overview of the latest and greatest. In this tutorial, you’ll learn about Nmap’s new traceroute feature, the addition of the Zenmap graphical interface, Nmap’s exclusive new OS fingerprinting engine, the new port disposition explanations, and an exciting new Nmap scripting engine!

Fyodor has released the tenth-anniversary edition of Nmap! Version 4.50 hit the Internet on December 12th, and it includes hundreds of tweaks, enhancements, and feature additions since the last major release a year ago. Even with all of these new features, there are a handful that shine a bit brighter than others. If you've already…

“The network is slow!” Almost everyone in Information Technology has heard the cries of the end user community when their important application begins crawling. Because of the complexities associated with modern application infrastructures, technology professionals are often challenged to determine the source of the slowdown. Is the application sluggishness related to the network, security configuration, the end-user workstations, the server, or the application?

In the last mini-training course lesson, we learned about the different methods of gathering the network traffic created during our Nmap scans. In this lesson, we’ll go through our trace file and see exactly what happens when Nmap hits the network.

Have you ever wondered what really happens across the network during an Nmap scan? In this tutorial, we’ll find out how to take a closer look into the thousands of packets that traverse the network during a default Nmap scan.

Have you ever wanted to use Nmap, but you didn’t want to install it on your computer? In this excerpt of a Professor Messer webinar, we’ll give you an overview of Live CD Distributions and show you how to use Nmap from the free VMware Player.